66289386 has 16 divisors (see below), whose sum is σ = 132660000. Its totient is φ = 22082928.

The previous prime is 66289369. The next prime is 66289387. The reversal of 66289386 is 68398266.

It is a super-3 number, since 3×66289386³ (a number of 24 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66289387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14485 + ... + 18503.

It is an arithmetic number, because the mean of its divisors is an integer number (8291250).

Almost surely, 2^66289386 is an apocalyptic number.

66289386 is an abundant number, since it is smaller than the sum of its proper divisors (66370614).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66289386 is a wasteful number, since it uses less digits than its factorization.

66289386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6773.

The product of its digits is 746496, while the sum is 48.

The square root of 66289386 is about 8141.8294013078. The cubic root of 66289386 is about 404.7137865018.

The spelling of 66289386 in words is "sixty-six million, two hundred eighty-nine thousand, three hundred eighty-six".